An essay on the malformations and congenital diseases of the organs of sight / by W. R. Wilde.

  • Wilde, W. R. (William Robert), 1815-1876.
Date:
1862
Catalogue details

Licence: Public Domain Mark

Credit: An essay on the malformations and congenital diseases of the organs of sight / by W. R. Wilde. Source: Wellcome Collection.

Provider: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)

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    twelve years of age, made from a drawing taken when the pupils were dilated with belladonna, we have a good represen- tation of one of the most frequent forms of congenital cap- sulo-lenticular cataract. In the original, the dull flake- white, irregularly-edged, and uneven surface of the large patch of opaque cap- sule contrasts well with the greyish-white substance of the lens beyond and behind it. In this, as well as other in- stances that I have met with, the capsular opacity resembled that siliquose condition which follows upon accidents in which, the capsule being ruptured, the substance of the lens is ab- sorbed, and the two hemispheres, thickened and rendered opaque by inflammatory action, adhere, and present the ap- pearance so well known, not merely to the oculist, but to the general hospital surgeon. In Lynn's case, however, the volume of the lens was preserved, although the opaque capsule, viewed in profile, seemed to project beyond its surface; and finally, after the lens was completely absorbed subsequently by kera- tonyxis, this opaque body, partially obscuring the pupil, had to be removed, through an opening in the cornea. The needle makes no impression on such formations; if they are small and central, they start from the surface, as in the case of Mooney, already*alluded to; but if they occupy so large a portion of the capsule as in the case of Lynn, the cutting side of the needle should be passed round the edge, so as to bring the lens into contact with the aqueous fluid ; and, subsequently, if they cannot be displaced from the field of vision, they should be extracted. MALFORMATIONS OF THE VITREOUS BODY, RETINA, AND OPTIC NERVE. Having already, at page 26, described the formative process in the human eye, it is unnecessary to enter at any length upon